2027 ICD-10-CM Diagnosis Code D86.84Sarcoid pyelonephritis

ICD-10-CM Codes›D50–D89›D80-D89›D86

ICD-10-CM D86.84
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

D86.84 is a billable ICD-10-CM diagnosis code for sarcoid pyelonephritis. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 196 through 198. Coders also document this condition as granulomatous sarcoid nephropathy. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Immunity disorders.

D86.84 does not risk-adjust for Medicare Advantage under the CMS-HCC V28 model. It still risk-adjusts in the ESRD (V21) category 141 for payment year 2027.

Code Identity

ICD-10-CM Code
D86.84
Billable Status
Yes — Valid for Submission
Code Describes
Sarcoid pyelonephritis
Short Description
Sarcoid pyelonephritis
Same as the full description in the CMS dataset.
Parent Code
D86.8
Sarcoidosis of other sites

Code Classification

ChapterD50–D89Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism
SectionD80-D89Certain disorders involving the immune mechanism
CategoryD86Sarcoidosis
This CodeD86.84Sarcoid pyelonephritis

Medicare Risk Adjustment (HCC)Billing

D86.84 does not risk-adjust for Medicare Advantage under the CMS-HCC V28 model, but it maps to payment categories in the other CMS models shown below.

CMS-HCC V28 (Medicare Advantage Payment Model)
Not mapped
no payment category in the model that pays 100% of MA risk scores
Prior Model (CMS-HCC V24)
Not mapped under V24
this diagnosis newly risk-adjusts under the V28 model
Other CMS Models
ESRD (V21): HCC 141
ESRD V21 weights: 0.000 dialysis, 0.000 functioning graft
Part D (RxHCC)
Not mapped
D86.84 does not risk-adjust in the RxHCC prescription drug model

Source: CMS Payment Year 2027 risk adjustment mappings and model software. Weights are relative factors, not dollar amounts; a beneficiary's total RAF also includes demographics and interactions. Browse all CMS-HCC categories.

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Granulomatous sarcoid nephropathy
  • Granulomatous tubulointerstitial nephritis

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to D86.84: its own notes plus those printed at block D80-D89 and Chapter 3. A note printed at a category, block or chapter applies to every code under it.

Includes

Further defines, or gives examples of, the content of the category.

From Block D80-D89 Certain disorders involving the immune mechanism applies to 83 codes
  • defects in the complement system
  • immunodeficiency disorders, except human immunodeficiency virus [HIV] disease
  • sarcoidosis

Applicable To

Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.

  • Tubulo-interstitial nephropathy in sarcoidosis

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

From Block D80-D89 Certain disorders involving the immune mechanism applies to 83 codes
  • autoimmune disease (systemic) NOS (M35.9)
  • functional disorders of polymorphonuclear neutrophils (D71-)

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Block D80-D89 Certain disorders involving the immune mechanism applies to 83 codes
  • human immunodeficiency virus [HIV] disease (B20)
From Chapter 3 (D50-D89) Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism applies to 324 codes
  • autoimmune disease (systemic) NOS (M35.9)
  • certain conditions originating in the perinatal period (P00-P96)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • human immunodeficiency virus [HIV] disease (B20)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name D86.84, its category, or a range that includes it.

Excludes1 2

These codes carry an Excludes1 note naming D86.84: they are not reported together with it, unless the two conditions are unrelated.

  • N16 Renal tubulo-interstitial disorders in diseases classified elsewhere
    pyelonephritis and tubulo-interstitial nephritis in sarcoidosis (D86.84)
  • D72 Other disorders of white blood cells
    immunity disorders (D80-D89) names D80-D89, which includes this code

Code First 1

These codes say to code first a condition named in the note, and D86.84 is one of the conditions named.

  • J84.170 Interstitial lung disease with progressive fibrotic phenotype in diseases classified elsewhere
    sarcoidosis (D86.-) names D86.-, which includes this code

Code Also 1

These codes say D86.84 may also be needed to fully describe the condition. The note gives no sequencing direction.

  • I27.29 Other secondary pulmonary hypertension
    sarcoidosis (D86.-) names D86.-, which includes this code

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR BLD008
Immunity disorders
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Sarcoidosis

    an idiopathic systemic inflammatory granulomatous disorder comprised of epithelioid and multinucleated giant cells with little necrosis. it usually invades the lungs with fibrosis and may also involve lymph nodes, skin, liver, spleen, eyes, phalangeal bones, and parotid glands.

Patient EducationClinical

Sarcoidosis

Sarcoidosis is a condition in which groups of cells in your immune system form small, red, and swollen (inflamed) lumps. These lumps are called granulomas. They can form in any organ in the body. But they most commonly affect the lungs and lymph nodes in the chest. Over time, sarcoidosis can cause permanent scarring of organs.

The full article covers:

  • What is sarcoidosis?
  • What causes sarcoidosis?
  • Who is more likely to develop sarcoidosis?
  • What are the symptoms of sarcoidosis?
  • What other problems can sarcoidosis cause?
  • How is sarcoidosis diagnosed?
  • What are the treatments for sarcoidosis?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert D86.84 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
135 Sarcoidosis
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About D86.84Overview

What is the ICD-10 code for sarcoid pyelonephritis?

The ICD-10-CM code for sarcoid pyelonephritis is D86.84 (sometimes written as D8684). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is D86.84 (Sarcoidosis of other sites) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report sarcoid pyelonephritis on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does D86.84 group to?

When sarcoid pyelonephritis is the principal diagnosis on an inpatient stay, it groups to MS-DRG 198, 197, 196, with relative weights from 0.7256 to 1.8335 depending on complications. Higher weights mean higher Medicare reimbursement.

Can D86.84 be reported with M35.9?

Not as a rule. The Excludes1 note at block D80-D89, which applies to D86.84, lists "autoimmune disease (systemic) NOS (M35.9)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).

What is the ICD-9 equivalent of D86.84?

Under the General Equivalence Mappings, sarcoid pyelonephritis converts to ICD-9-CM 135 (sarcoidosis). The mapping is approximate, so confirm the match fits the documentation.

Does D86.84 risk-adjust for Medicare Advantage payment?

Not for Medicare Advantage: D86.84 maps to no category in the CMS-HCC V28 model. It still risk-adjusts in the ESRD (V21) category 141 (Nephritis).